<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>data</title>
    <style>
        #myIframe {
          width: 100%;
          height: 100%;
          position: absolute;
          top: 0;
          left: 0;
        }
      </style>
    <iframe id='myIframe' src='https://e.idataviz.com/src/q.html?s=nankai-307e7d21d67eb42a'></iframe>
    <link rel="stylesheet" href="btn.css"/> 
    <div id="float-btn" onclick="backToHome()">
	<img src="./image/hbtn.png" width="40px" height="40px"></div>
        <script>    function backToHome(){
                window.open("home.html", "_self");
            }</script>

</head>
<body>
    <script>
    function backToHome(){
        window.open("home.html", "_self");
    }
</script>
</body>
</html>
